After a few days thinking about this it could be interesting for reading the tire model and setting the ecu map or mode.   fit semi slicks and have ecu go into track mode with higher boost etc.  combined with outside, tire temp or under car temp sensor you could know where I the tire compound is operating.   or at the least log what tire was on the car when it was started.   the tag is tiny so I suspect you’d need a coil in each wheel well to power them up. Still if you have those IR tire sensor fitted already it could be a simple add on.    since this is close to ID badge cloning there are already a lot of projects and documentation around. Security conference already have a few people with long range badge closers. Car thieves also have a lot of tech for reading key fobs to start cars and that is all the same principles.

Thanks Bibendum  

Definately worth doing, $1k for a healthier car is worth it. If youre game you can get a tactrix cable, romraider and DIY. You can get decent gains with a laptop, wideband and a bit of time (a lot of time) spent tweaking the fuelling, timing and boost maps. 

GV WRX STI Spec R

Downloaded ROM, fitted tomei EL headers and invidia downpipe, ported tgvs and fitted sec air pump delete plates.